[Experimental] Supporting OOPIF printing

content/renderer/render_frame_proxy.cc

Index: content/renderer/render_frame_proxy.cc
diff --git a/content/renderer/render_frame_proxy.cc b/content/renderer/render_frame_proxy.cc
index 15d61ea9f8e3cf635a42f316405f3ba976f0a56d..caac920187785de34d9eb9a02df377ed8c4685d5 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -533,4 +533,10 @@ void RenderFrameProxy::frameFocused() {
   Send(new FrameHostMsg_FrameFocused(routing_id_));
 }
 
+int RenderFrameProxy::print(const blink::WebRect& rect, int page_num) {
+  gfx::Rect r = rect;
+  Send(new FrameHostMsg_PrintRemoteFrame(routing_id_, r, page_num));
+  return routing_id_;
+}
+
 }  // namespace